Evaluation of "Periotest" for prosthetic clinical application.

Dynamics of the Periotest method of diagnosing the dental implant-bone interface

“…We should therefore note that c will depend on the tap point and direction of a real implant. In fact, such dependence of the Periotest value Q) Tapping rod (PTV) is well known [7,14]. Lastly, the mass m is the sum of the mass of the implant and the effective mass of the cortical bone surrounding it, or the mass of the implant alone, depending on whether the interface is hard or soft.…”

Comparison between acoustic and mechanical tapping methods for assessing the interfacial states of bone implants

“…The method is based on measuring the time (0.27 to 2.3 msec) during which a tapping rod kept horizontal is contacted with a tested tooth. The instrument, which is produced commercially under the name of Periotest (Siemens, Bensheim), has been proved excellent [4,5]. The tooth mobility is expressed by a number called the Periotest value, or PT value, which increases with the contact time, ranging from -8 to 50.…”

“…The tooth mobility is expressed by a number called the Periotest value, or PT value, which increases with the contact time, ranging from -8 to 50. The instrument has also been applied to dental implants [5,6]; for instance, Ogiso et al [6] have reported that apatite-coated metal implants, which are thought to adhere to bone tissue, have PT values of -5 to -7.…”